Compressive Residual Stress into Titanium Alloy Using Cavitation Shotless Peening Method |
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| Authors: | Soyama Hitoshi Macodiyo Dan O Mall Shankar |
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| Affiliation: | (1) Center for Green Materials Technology, School of Advanced Materials Engineering, Andong National University, Andong, Kyungbuk, 760-745, South Korea;(2) Department of Aeronautics and Astronautics, AFIT/ENY, Air Force Institute of Technology, Wright-Patterson Air Force Base, Bldg. 640, Hobson way, Dayton, OH 45433-7765, USA; |
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| Abstract: | Cavitation shotless peening (CSP) method, where impacts are generated by a submerged cavitating jet (without shots), was used to introduce compressive residual stress in titanium alloy, Ti-6Al-4V for the purpose of enhancing the conventional fatigue and fretting fatigue life and strength. This method provided higher compressive stress at surface as well as up to a depth of 40  m from the surface than that with the shot peening method. Further, the surface treated by CSP was considerably less rough compared to that by the shot peening method, which is a highly desirable feature to improve the fretting fatigue performance. |
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| Keywords: | residual stress surface modification cavitation shot peening titanium roughness |
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